Compressing-tool.



H. 0. EWING.

COMPRESSING TOOL. APPLICATION FILED SEPT. 13, 1916.

1,267,393." Patented May 28,1918.

#Harney in annular grooves arie.

F MEDLEPORT, OHIO.

conrnnssnfie-roon.

Speciileation of Lettere Patent.

Patented May 28, 1913.

Application. led September. 13, 1916.y Serial No. 119,966.

To ali whom t may concern:

Beit known that I, HERBERT O. EWING,

'residing at Middleport, Meigs county,v State of hio, have invented 'a certain new and useful Compressing-Tool, of which the foland exact descriplowing is a clear, full, tion, attention being called to the drawing which accompanies this application and forms a part thereof.

Packing rings in pistons have a tendency to expand and insertion of a piston into' its cylinder becomes diiicult because the expanded rings are of a size which exceeds the diameter of the cylinder and form an obstruction to the insertion .of the piston.

My.l invention concerns a tool constructed 'in a certain manner for the particular purpose of assisting the insertion ofa piston with the packing rings thereon into its cylinder byserving to overcome the obstruction interposed by the packing rings while in expanded state. The tool acts by compression lwhereby the packing rings are contracted to a reduced diameter so that they do not project beyond the piston so that this latter may readily pass into its cylinder.

1n the following spec1ficat1on and particularly pointed out in the claims at the end thereof is found a fulldescription of my to'ol., its manner of use and its construction which latter is also illustrated -in the accompanying drawing in whichf Figure 1. illustrates in a sectional view of parts of an Why and ho the placing of the piston into the cylinder and the manner in which this interference is overcome by my tool.

Fig 2. shows the tool applied to the piston and arranged for use thereon.

Fig. 8. shows how the tool is used.

Fig. a. is a horizontal section on line of Fig. 2.

An extended use of the tool is found in connection with the cylinders of explosive engines which have to be cleaned quite frequently, which requires removal of the piston and re-insertion of the same.

In the drawing numeral 7 indicates part of such a cylinder and 8 shows part of the piston thereof.

Numeral 9 indicates packing rings interfere with packing rin s seated 10 in the side o the pis-z ton. These rings are split or open and norreally are larger. in diameter than the inmde -into its cylinder until su Wpgine cylinder and its, piston of the cylinder, as shown at a in Fig. 1, so that whenv the piston occupies itsr cylinder they impinge against cylinder wall as shown' at in Fig. 1.

@bviously in their expanded state they form an impediment to the insertion of its piston into the cylinder.

To. overcome this impediment I provide aiiexible band 11, preferably a metallic tape, which is successsively looped around each of the various packing rings of the pistonand so as to leave part of. he engaged ring nearest the cylinder free as shown at c in Fig. 1. The loop is now contracted so as to compress thev engaged .ring and to forceit into its groove pressed ring has passed in and under the edge of the cylinder so as to be held.there' by without the aid of the band7 which may -now be taken od."

The' piston may farther into the cylinder until the -next packing ring stops further progress, after which the band is again applied. p l

For the purpose of reducing the loop formed by the band, l provide two levers 12 and 13, substantially alike and connected to each other by a pivot 14 as shown.

Both levers are extended 'beyond this pivot and shaped to form complementary sectiions 'A15-15 of a handle for grippingthe too f A spring 16 is interposed to keep these handle sections normally apart so as to hold the levers at the other side of the pivot in position ready for action.

The band is connected to the free ends of these levers, it being permanently jointed at one of its ends to one of them by a pin 17 Its connection tothe free end of the other lever is a temporary one and may be at any point between its ends. lThis connection is by means of a locking device carried at the free end of said lever.

\ inthe application of the tool the band is positioned around the packin ring' to be compressed and passed throng an o i1.' in lever 12 back of pin 17 whereb it 1s connected to said lever. Thereafter it is passed through a similar opening in lever 13 and drawn taut by pullingat its free end as indicated by the arrow in Fig. 2. Finally it is locked to lever 13, as shown in Fig. 3g ar which the sections or thepping after which the plston is advanced cient of the comthen be readily advanced the inner side of the roe yapplied to the looped part of the `until the piston is handle are firmly grasped and pressed tof gether as shown' -in the same ligure, so as to cause the free ends of the levers to move apart. Additional pull is thereby band, 1s eircumferentially reduced, which action is transferred to the packing ring encircled by it whereby this ring is compressed in its grooves for the purpose described and as shown at c in Fig. l.

The levers may advanced into the cylinder, by a pawl 1 8 on one lever which is placed in engagement with one of a number of notches 19 on the other.

A spring 2l maintains the engagement of this pawl with one of these notches and a button or turned-up lip 22 on it serves as a `man`ipulat1ng means for disengaging it therefrom.

'A cam or eccentrically mounted roller 23 is used' for locking band 11 to leverl 13 and is supported in bearings provided foil' it at the free end of said lever. ln positioning the band as before described it is passed lthrough the space between this roller and a shoulder 24 and it is now locked by being clamped against this shoulder by means of roller 23, a handle 25 being provided for manipulation. rlhis handle 1s so located and f shaped that by swinging the ripped tool toward the piston, the free end o? this handle may at the saine time be pressed side of this piston thus increasing the pressure whereby roller 23 locks the band. Observe arrow in Fig. 3.

A lip 26 back of pin'17 serves as a guide and facilitates passing in of the band when the same is positioned'as before described. The tool .may be manufactured in any be held in this position I through the other one against they Having described-my invention, l claim l as new: y

l. In a piston ring compressing tool, pliers comprising a pair of jaws, and handles connected to said jaws to separate said jaws when said handles approach, la relatively wide and thintlexible band pivotally connected to vone of said jaws forming a loop and extending through said one of said jaws past its pivotal connection thereto and of said jaws, and

grlpping means on said other jaw where said band extends therethrough to gri said band as said jaws recede, substantieJ y as and for the purposes set forth. 2. ln a piston ring compressing tool, pliers comprising a pair of jaws, and handles connected to said jaws to separate said jaws when said handles approach, a relatively wide and thin flexible band pivotally connected to one of said jaws, forming a loop and extending through' said one of Said jaws past its pivotal yconnection thereto and through the other one of said jaws, a cam on this other jaw to grip said band where its passes therethrough, and a handle fixed to said cam to engage with the surface adjacent to which said cam is brought and thereby'cause said cam to grip said band.

In test1mony HERBERT O. ENG. 

